RHBA-2011:0776 - Bug Fix Advisory

Topic

An updated vgabios package that fixes two bugs is now available for Red Hat
Enterprise 6.

Description

The vgabios package provides is an GNU Lesser General Public License (LPGL)
implementation of a BIOS for a video card. The vgabios package contains BIOS
images that are intended to be used in the Kernel Virtual Machine (KVM ).

This update fixes the following bugs:

• Previously, the vgabios for the qemu standard vga expected to find the

framebuffer memory at the magic address 0xe0000000. Due to the overlapping
memory reservations, qemu-kvm aborted unexpectedly when the guest operating
system (OS) tried to use the address space at 0xe0000000 for other spaces, e.g.
mapping resources of hot-plugged PCI devices. This update changes the vgabios to
lookup the framebuffer memory in PCI space instead. Now, the address space at
0xe0000000 can freely be used by the guest OS. (BZ#654639)

• Previously, vgabios did not support DOS Protected Mode Services (DPMS) for

Amazon Simple Storage Service (Amazon S3) for Windows guests. This update adds
DPMS support. (BZ#691344)

All users of vgabios are advised to upgrade to this updated package, which fixes
these bugs.

Solution

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/kb/docs/DOC-11259/

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64

Fixes

• BZ - 654639 - [vgabios] bochs vga lfb @ 0xe0000000 causes trouble for hot-plug
• BZ - 691344 - vgabios is missing DPMS support (for S3 support for Win guests)

CVEs

(none)

References

(none)